So I recently came into possession of a Freebie GMPP header.

• First: noticeable difference was visual, the runners were laid out differently.
• Second: you can see straight through looking from the collector to the Ports.
• Third: Collector is completely open. Stock Manifold is half filled in my metal.
• Exhaust port openings are slightly larger.

So being that i work in a machine shop. I cleaned it up a bit before it went into the car. First to the Media blaster, than to the parts washer, followed by a nice coat of 1500* black paint. Now off to the Grinder. Took a snake die grinder to it, smoothed out the walls, got rid of any sharp edges, shaved down bumps, all in all took about three hours.

So install. ( Car was on Jack Stands)
Let engine cool down. (Hose helped)
Remove Heat Shielding top and bottom.
Unbolt downpipe.
Unbolt header. sometimes the whole stud came out with the nut but oh well.
Pull header off of studs move it down and towards the block, to allow clearance from the DP.
Remove from underneath car.
Replace gaskets.
Reinstall.

So results. After testing for leaks. It's time to get some speed. So first off there was no more rasp to my exhaust note. We get to a nice long stretch of highway. So i hit the light. GREEN=Go. Launch at 2500rpm, tach climbs hits about 4500 dives straight to redline. Pop clutch into Second break tires loose, same result 4500 rpm to redline like it's nothing. Damn traffic. So we go to a spot where we've previously measured 1/4 mile. Out comes the HotWheels Radar gun. Ok so the token asian flags me off. My buddy fish hits the stopwatch. At full wot car pulling hard, rough est. trap 92 mph at roughly 15.0. Yay I'm happy, results will be fully tested @Cecil County Dragway friday. My favorite pull with the new toy is fourth gear, goes from 70 - 100 like a fat kid loves cake.*

This modification is YellowLT approved.



* All road test performed on back roads and out of traffic, while playing Rick Ross "Push it to The Limit" Oh and I'm throwing a lean code.CEL FTL

 

Pics

 

Of stock? or New?

 

Of what you did to the GMPP one.

 

agreed

 

It's on the car already and I really dont wanna pull it back off.

 

HotWheels Radar gun FTW

 

HELL YEAH!